Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual condado tem uma renda familiar mediana de $50.227?
 ###Tabelas: CREATE TABLE 1939 (1939_id AUTO_INCREMENT PRIMARY KEY, Title VARCHAR, Series VARCHAR, Director VARCHAR, Production Num. VARCHAR, Release date VARCHAR) CREATE TABLE doubles_9_5–4 (doubles_9_5–4_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents VARCHAR, Score VARCHAR) CREATE TABLE uk_ratings (uk_ratings_id AUTO_INCREMENT PRIMARY KEY, Episode number INT, Title VARCHAR, Original airing on Channel 4 VARCHAR, Time of airing on Channel 4 VARCHAR, Total viewers and Rank on C4 VARCHAR, Total viewers VARCHAR) CREATE TABLE singles_performance_timeline (singles_performance_timeline_id AUTO_INCREMENT PRIMARY KEY, Tournament VARCHAR, 1990 VARCHAR, 1991 VARCHAR, 1992 VARCHAR, 1993 VARCHAR, 1994 VARCHAR, 1995 VARCHAR, 1996 VARCHAR, 1997 VARCHAR, 1998 VARCHAR, 1999 VARCHAR, 2000 VARCHAR, 2001 VARCHAR, Career SR VARCHAR, Career Win-Loss VARCHAR) CREATE TABLE ohio_counties_ranked_by_per_capita_income (ohio_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT)  
SELECT County FROM ohio_counties_ranked_by_per_capita_income WHERE Median family income = $50,227